refactor: Replace paramiko with asyncssh for SSH connections

Switches the SSH implementation from `paramiko` to `asyncssh` for
improved capabilities and performance. Updates logic in SSH tunnel
handling, authentication, and dependencies.

Signed-off-by: Sven Sager <akira@narux.de>

setup.py

@@ -19,7 +19,7 @@ setup(
     install_requires=[
         "keyring",
         "PyQt5",
-        "paramiko",
+        "asyncssh",
         "revpimodio2",
         "zeroconf"
     ],